pdf forms?

I need to create a bunch of forms for a site. I was going to create php forms & use formmail thats on most cpanel accounts.

I have all the forms that need to be on the site in pdf format. I thougt it would be easier if I could make the existing pdf files into forms using acrobat IF it is possible to submit them using the formail script?

I know I can insert form fields and buttons in pdf but how would you insert the recipient, subject & redirect hidden fields that are normally in the html?

I never tried a pdf form so I was wondering if I should just stick to the php forms and only use pdf for my printable docs?

Thanks,
George